1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * Test Name: sigprocmask01 22 * 23 * Test Description: 24 * Verify that sigprocmask() succeeds to examine and change the calling 25 * process's signal mask. 26 * Also, verify that sigpending() succeeds to store signal mask that are 27 * blocked from delivery and pending for the calling process. 28 * 29 * Expected Result: 30 * - sigprocmask() should return value 0 on successs and succeed to change 31 * calling process's set of blocked/unblocked signals. 32 * - sigpending() should succeed to store the signal mask of pending signal. 33 * 34 * Algorithm: 35 * Setup: 36 * Setup signal handling. 37 * Create temporary directory. 38 * Pause for SIGUSR1 if option specified. 39 * 40 * Test: 41 * Loop if the proper options are given. 42 * Execute system call 43 * Check return code, if system call failed (return=-1) 44 * Log the errno and Issue a FAIL message. 45 * Otherwise, 46 * Verify the Functionality of system call 47 * if successful, 48 * Issue Functionality-Pass message. 49 * Otherwise, 50 * Issue Functionality-Fail message. 51 * Cleanup: 52 * Print errno log and/or timing stats if options given 53 * Delete the temporary directory created. 54 * 55 * Usage: <for command-line> 56 * sigprocmask01 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t] 57 * where, -c n : Run n copies concurrently. 58 * -e : Turn on errno logging. 59 * -f : Turn off functionality Testing. 60 * -i n : Execute test n times. 61 * -I x : Execute test for x seconds. 62 * -P x : Pause for x seconds between iterations. 63 * -t : Turn on syscall timing. 64 * 65 * History 66 * 07/2001 John George 67 * -Ported 68 * 69 * Restrictions: 70 * None. 71 */ 72 73 #include <stdio.h> 74 #include <unistd.h> 75 #include <sys/types.h> 76 #include <errno.h> 77 #include <fcntl.h> 78 #include <string.h> 79 #include <signal.h> 80 #include <ucontext.h> 81 82 #include "test.h" 83 84 void setup(); /* Main setup function of test */ 85 void cleanup(); /* cleanup function for the test */ 86 void sig_handler(int sig); /* signal catching function */ 87 88 char *TCID = "sigprocmask01"; 89 int TST_TOTAL = 1; 90 91 int sig_catch = 0; /* variable to blocked/unblocked signals */ 92 93 struct sigaction sa_new; /* struct to hold signal info */ 94 sigset_t set; /* signal set to hold signal lists */ 95 sigset_t sigset2; 96 97 int main(int ac, char **av) 98 { 99 int lc; 100 pid_t my_pid; /* test process id */ 101 102 tst_parse_opts(ac, av, NULL, NULL); 103 104 setup(); 105 106 for (lc = 0; TEST_LOOPING(lc); lc++) { 107 108 tst_count = 0; 109 110 /* 111 * Call sigprocmask() to block (SIGINT) signal 112 * so that, signal will not be delivered to 113 * the test process. 114 */ 115 TEST(sigprocmask(SIG_BLOCK, &set, 0)); 116 117 /* Get the process id of test process */ 118 my_pid = getpid(); 119 120 /* Send SIGINT signal to the process */ 121 kill(my_pid, SIGINT); 122 123 if (TEST_RETURN == -1) { 124 tst_resm(TFAIL, 125 "sigprocmask() Failed, errno=%d : %s", 126 TEST_ERRNO, strerror(TEST_ERRNO)); 127 } else { 128 /* 129 * Check whether process received the signal. 130 * If yes! signal handler was executed and 131 * incremented 'sig_catch' variable. 132 */ 133 if (sig_catch) { 134 tst_resm(TFAIL, "sigprocmask fails to " 135 "change process's signal mask"); 136 } else { 137 /* 138 * Check whether specified signal 139 * 'SIGINT' is pending for the process. 140 */ 141 errno = 0; 142 if (sigpending(&sigset2) == -1) { 143 tst_brkm(TFAIL, cleanup, 144 "blocked signal not " 145 "in pending state, " 146 "error:%d", errno); 147 } 148 149 /* 150 * Check whether specified signal 151 * is the member of signal set. 152 */ 153 errno = 0; 154 if (!sigismember(&sigset2, SIGINT)) { 155 tst_brkm(TFAIL, cleanup, 156 "sigismember() failed, " 157 "error:%d", errno); 158 } 159 160 /* 161 * Invoke sigprocmask() again to 162 * unblock the specified signal. 163 * so that, signal is delivered and 164 * signal handler executed. 165 */ 166 errno = 0; 167 if (sigprocmask(SIG_UNBLOCK, 168 &set, 0) == -1) { 169 tst_brkm(TFAIL, cleanup, 170 "sigprocmask() failed " 171 "to unblock signal, " 172 "error=%d", errno); 173 } 174 if (sig_catch) { 175 tst_resm(TPASS, "Functionality " 176 "of sigprocmask() " 177 "Successful"); 178 } else { 179 tst_resm(TFAIL, "Functionality " 180 "of sigprocmask() " 181 "Failed"); 182 } 183 /* set sig_catch back to 0 */ 184 sig_catch = 0; 185 } 186 } 187 188 tst_count++; /* incr TEST_LOOP counter */ 189 } 190 191 cleanup(); 192 tst_exit(); 193 } 194 195 /* 196 * void 197 * setup() - performs all ONE TIME setup for this test. 198 * Initialise signal set with the list that includes/excludes 199 * all system-defined signals. 200 * Set the signal handler to catch SIGINT signal. 201 * Add the signal SIGINT to the exclude list of system-defined 202 * signals for the test process. 203 */ 204 void setup(void) 205 { 206 207 tst_sig(FORK, DEF_HANDLER, cleanup); 208 209 TEST_PAUSE; 210 211 /* 212 * Initialise the signal sets with the list that 213 * excludes/includes all system-defined signals. 214 */ 215 if (sigemptyset(&set) == -1) { 216 tst_brkm(TFAIL, cleanup, 217 "sigemptyset() failed, errno=%d : %s", 218 errno, strerror(errno)); 219 } 220 if (sigfillset(&sigset2) == -1) { 221 tst_brkm(TFAIL, cleanup, 222 "sigfillset() failed, errno=%d : %s", 223 errno, strerror(errno)); 224 } 225 226 /* Set the signal handler function to catch the signal */ 227 sa_new.sa_handler = sig_handler; 228 if (sigaction(SIGINT, &sa_new, 0) == -1) { 229 tst_brkm(TFAIL, cleanup, 230 "sigaction() failed, errno=%d : %s", 231 errno, strerror(errno)); 232 } 233 234 /* 235 * Add specified signal (SIGINT) to the signal set 236 * which excludes system-defined signals. 237 */ 238 if (sigaddset(&set, SIGINT) == -1) { 239 tst_brkm(TFAIL, cleanup, 240 "sigaddset() failed, errno=%d : %s", 241 errno, strerror(errno)); 242 } 243 } 244 245 /* 246 * void 247 * sig_handler(int sig) - Signal catching function. 248 * This function gets executed when the signal SIGINT is delivered 249 * to the test process and the signal was trapped by sigaction() 250 * to execute this function. 251 * This function when executed, increments a global variable value 252 * which will be accessed in the test. 253 */ 254 void sig_handler(int sig) 255 { 256 /* Increment the sig_catch variable */ 257 sig_catch++; 258 } 259 260 /* 261 * void 262 * cleanup() - performs all ONE TIME cleanup for this test at 263 * completion or premature exit. 264 */ 265 void cleanup(void) 266 { 267 268 } 269
